The Michelson resonator free-electron laser - Part 1. Passive mode structure and mode decay
- Duke Univ., Durham, NC (United States)
The authors present a general analysis of the evolution of phase locking in an RF linac-driven Michelson resonator FEL. By undergoing a delay of one RF period in the secondary arm of the interferometer, successive optical pulses can be coupled at the beamsplitter so that they build up from noise with a definite phase relationship. Phase locking is described in terms of longitudinal mode decay by extracting the mode losses directly from the passive frequency response of the resonator. This analysis is shown to be equivalent to a coupled pulse eigenmode analysis in the time domain. However, the frequency domain analysis has a much wider range of application because it can be applied to other resonator configurations with arbitrary mirror detunings. These analyses predict significant mode structure simplification in microsecond macropulses, so that high resolution spectroscopy is feasible on RF linac-driven FEL's. Finally, they describe simulations of the perfectly tuned Michelson resonator FEL from spontaneous radiation to saturation using a one-dimensional pulse propagation code, and demonstrate excellent agreement with the analytical results in the small-signal regime.
- OSTI ID:
- 6338601
- Journal Information:
- IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Vol. 29:2; ISSN 0018-9197
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CAVITY RESONATORS
FREQUENCY ANALYSIS
FREE ELECTRON LASERS
LINEAR ACCELERATORS
MICHELSON INTERFEROMETER
MODE LOCKING
RF SYSTEMS
SPECTROSCOPY
TUNING
ACCELERATORS
ELECTRONIC EQUIPMENT
EQUIPMENT
INTERFEROMETERS
LASERS
MEASURING INSTRUMENTS
RESONATORS
426002* - Engineering- Lasers & Masers- (1990-)